System and method for estimating power consumption of electric apparatus, and abnormality alarm system utilizing the same
First Claim
1. A method for estimating individual electricity consumption of a plurality of electric appliances used by a user, said method comprising:
- obtaining fundamental and higher harmonics of total load current and their phase differences from voltage obtained from said total load current and voltage measured in a vicinity of a service entrance into said user; and
estimating electric appliances in operation and individual electricity consumption of said electric appliances from said fundamental and higher harmonics of said total load current and said their phase differences from voltage.
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Abstract
A method and a system for estimating electricity consumption of electric appliances and an abnormality alarm system, enabling estimation of individual electricity consumption of electric appliances in operation in a building or the like by a non-intrusive method, and comprising a measuring sensor (11), data extracting means (12), and estimating means (13) such as an LMC. The estimating means (13) learns based on a training set in advance, and is able to estimate individual electricity consumption of electric appliances in operation. Fundamental and higher harmonics of total load current and their phase differences from voltage are obtained by the data extracting means (12) from measurement data VA, VB, IA, IB detected by an instrument transformer (111) and an instrument current transformer (112) provided in the vicinity of a service entrance 6 of a feeder 4 to a user 2. They are inputted to the estimating means (13) as inputs, thereby estimating individual electricity consumption of the electric appliances.
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Citations
6 Claims
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1. A method for estimating individual electricity consumption of a plurality of electric appliances used by a user, said method comprising:
- obtaining fundamental and higher harmonics of total load current and their phase differences from voltage obtained from said total load current and voltage measured in a vicinity of a service entrance into said user; and
estimating electric appliances in operation and individual electricity consumption of said electric appliances from said fundamental and higher harmonics of said total load current and said their phase differences from voltage.
- obtaining fundamental and higher harmonics of total load current and their phase differences from voltage obtained from said total load current and voltage measured in a vicinity of a service entrance into said user; and
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2. An electric appliance electricity consumption estimation system for estimating individual electricity consumption of a plurality of electric appliances used by a user, said system comprising:
- a measuring sensor set in a vicinity of a service entrance into said user;
data extracting means for fetching data concerning fundamental and higher harmonics of total load current and their phase differences from voltage obtained from said total load current and voltage detected by said measuring sensor; and
estimating means for estimating combinations of electric appliances in operation and individual electricity consumption of said electric appliances from said fundamental and higher harmonics of said total load current and said their phase differences from voltage. - View Dependent Claims (3, 4, 5, 6)
- a measuring sensor set in a vicinity of a service entrance into said user;
Specification